ELEMENT OF KOCHETOV NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/00 

FIELD: noise suppression technique.

SUBSTANCE: invention relates to noise suppression equipment for compressor stations and test boxes for gas turbine engines. Sound absorber contains a cylindrical frame in the form of a perforated sleeve and covers, filled with sound-absorbing element, the layer of acoustic transparent shell made of capron mesh made of glass cloth is arranged outside of bushing, and the frame comprises covers with circular collars for cylindrical bushing fixing, where the covers are connected by the central rod to the hooks at both ends, and the cylindrical bushing consists of two perforated shells, outer and inner, the space between them being filled with a sound-absorbing element, while the sound-absorbing material, placed in sound absorber inner cavity is made of unwinding roll. Covers have conical shape fairings at outer surfaces. Sound-absorbing element contains perforated walls, between which there are layers of sound-reflecting, as well as sound-absorbing materials of different density are arranged, located in two layers, wherein the sound-reflecting material layers are made with complex shape, and located respectively at the perforated walls, and the sound-reflecting material layers are made from heat-insulating material able to maintain preset microclimate in the room.

EFFECT: technical result is an increase in the efficiency of sound attenuation at high frequencies.

1 cl, 3 dwg